<!DOCTYPE html>
<!-- https://github.com/servo/servo/issues/9306 -->
<style>
  body {
    margin: 0;
  }

  .green {
    background: #0F0;
    height: 40px;
    width: 600px;
    margin-left: -300px;
  }
</style>

<div class="green">
</div>

